What does きます mean here? Also I'd like a translation for this sentence.
女の子達は両親に朝御飯を持ってきます。
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Sign up to join this community持って来ます is some sort of compound verb, and as many of these verbs it is best understood when reading it's conforming verbs in sequence.
There are a lot of this kind of words and you can even make your own as needed:
て-verb1 + verb2.
e.g. 傘を忘れて出かけました。 I forgot my umbrella and left(without it).
きます comes from the verb 来る (to come).
女の子達は両親に朝御飯を持ってきます。
= The girls will come and bring breakfast to the parents.